power-remote weight loss program in early stage breast cancer

Conditions: Early Stage Breast Cancer

Summary: this research is being done to assess the effectiveness of a weight loss program in women with early stage breast cancer whose body mass index (bmi) is in the overweight or obese range (\>25). weight loss is beneficial in improving cardiovascular risk factors and overall health, but may also decrease the chance of breast cancer coming back. a weight loss counseling program was studied in a general population and was found to be effective to help reduce weight over a 2 year period. the main goal of this study is to determine if women with a recent diagnosis of early breast cancer will also lose weight with this program. to better understand the effect that weight loss has on women with breast cancer, we will compare the patterns in blood and breast tissue samples (tissue biopsies will be optional), and questionnaires evaluating different aspects of one's well-being, before and after a dietary intervention or no intervention.

the prevalence of obesity has increased rapidly in recent years. epidemiological studies since the 1970's have strongly suggested that excess body weight gain may be a major risk factor for many cancers including breast cancer. in addition, once diagnosed with breast cancer, women who are overweight or obese experience worse outcomes despite standard local and adjuvant therapy. furthermore, most women gain weight following a diagnosis of breast cancer, and this weight gain may increase risk of recurrence by 40-50% and breast cancer-related mortality by 53-60%. a great deal of effort has been made for many years to explain the relationship between obesity and breast cancer. molecularly, the relationship involves dynamic and complex interactions between a milieu of hormones, cytokines, adipokines, affecting cell signaling and potentially epigenetic pathways. recently, studies in postmenopausal women have shown that weight loss modulates these cytokines and adipokines favorably. inflammation associated with obesity can also be characterized pathologically when macrophages surround necrotic adipocytes in what are called crown-like structures (cls). furthermore, increased central obesity as measured by waist-to-hip ratios, may be associated with hypermethylation of certain breast cancer genes, and physical activity can reduce methylation of certain breast cancer-associated genes. the women's intervention nutrition study (wins) demonstrated that women with early-stage breast cancer receiving conventional cancer management randomized to a dietary intervention group had lower risk of relapse compared to those in a control group in those who lost weight. while women with a diagnosis of breast cancer are therefore recommended to maintain ideal body weight, limited progress has been made in developing feasible weight loss programs. however, collaborators from the welch center for prevention, epidemiology, and clinical research at the johns hopkins university have recently reported impressive and sustained weight loss in randomized controlled trials designated practice-based opportunities for weight reduction (power) in obese women with at least one cardiovascular risk factor using a remote-support weight loss intervention. the overall goal of this study is to determine the effectiveness of the remote-support weight loss intervention of the power study, designated power-remote, in women with early breast cancer who are overweight or obese, and to assess the effects of weight loss of ≥5% body weight at 6 months and on biomarkers associated with obesity, inflammation, and breast cancer. the data will be used to implement a clinical intervention available to all overweight and obese women with breast cancer, and to design definitive studies assessing the impact of weight loss and biomarker modulation on risk of recurrent disease or development of new primary breast cancers.

Eligibility criteria:
inclusion criteria: * women * 18 years or older * ductal carcinoma in situ (dcis) or stage i-iii invasive breast cancer * eastern cooperative oncology group (ecog) performance status 0-2 * current bmi ≥ 25 kg/m2 and weight ≤ 400 lbs, and willing to lose \>5% of their body weight. note: participants may not have documented weight loss greater than 5% of body weight from time of diagnosis. exceptions that are felt to be due to surgical or other procedures (e.g., mastectomies or reconstruction) may be allowed with prior approval of the protocol chair/designee. * patients must have completed local therapy (i.e. surgery and radiation therapy), and any preoperative or adjuvant chemotherapy within \>3 and \ 3 months after initiation of hormone therapy if expected to continue the same hormone agent for at least the first 6 months of the study. concurrent enrollment in other interventional or drug clinical trials is at the discretion of the protocol chair. * willingness to change diet, physical activity and weight. * to ensure compliance with the power-remote and patientviewpoint programs, patients must meet the following: prior experience with web forms and feels able to use the power-remote web program and patientviewpoint; has or is able to download internet explorer 8+, firefox 3.0+, safari 4.0+, chrome 4.0+, and adobe flash player 10; familiarity with and access to internet at least 4 days per week; use of an email program or willing and able to establish one for this study; and, able to read and write the english language without assistance. * patient is aware of her diagnosis, understands the study regimen, its requirements, risks, and discomforts, and is able and willing to sign an informed consent form. exclusion criteria: * history of another prior cancer within the last 5 years, with the exception of another breast cancer, adequately treated cone-biopsied in situ carcinoma of the cervix uteri, and basal or squamous cell carcinoma of the skin * medical condition likely to hinder accurate measurement of weight, including any condition: for which weight loss is contraindicated, which would likely cause weight loss, or which would affect adipokine and inflammatory markers (e.g., end stage renal disease (esrd) on dialysis, cirrhosis, autoimmune disease, adrenal disease, and history of bariatric surgery). * the use of the following medications are excluded: insulin or sulfonylureas; patients with thyroid disease who are not on stable doses of thyroid medication for at least the past 6 months; medications that cause weight loss (e.g., topiramate, bupropion, exenatide, lorcaserin, phentermine or orlistat) within the past 3 months; medications that are likely to cause weight gain or prevent weight loss (e.g., corticosteroids, lithium, olanzapine, risperidone, clozapine, oral contraceptive pills, hormone replacement therapy) within the past 3 months; medications that may affect adipokine or inflammatory markers (e.g., sulfonylureas, glitazones, insulin, steroids, ace inhibitors, beta blockers and statins) unless started ≥3 months prior to enrollment, or chronic nsaids (defined as use of ≥3 times a week) for ≥1 month. * pregnant or nursing within past 6 months, or plans to become pregnant in the next year * currently enrolled or planning to enroll in a weight loss program (e.g., innergy, weight watchers, jenny craig, nutrisystem, and medifast).

Keywords: breast cancer early stage weight loss